Senator Fielding said the world economic crisis was so grave that, in the interests of stability in Australia, the government should be allowed to pass all its budget measures.

Remaining - and controversial - budget measures include the alcopops tax, and changes to the thresholds for the Medicare levy surcharge.

Senator Fielding said he would now vote in support of both measures he had previously opposed.

Due to financial uncertainty and the massive economic downturn, economic stability was paramount to Australia, he said.

"We will support the government's remaining tax budget bills to bring about the stability," he told reporters in Canberra.

"We're making it quite clear today that we'll support the government's remaining tax bills.

"There is (sic) absolutely no caveats on it."

Senator Fielding said he would seek to move amendments to the remaining budget bills, but would pass the bills regardless of the result.

Constituents, who were deeply worried about their superannuation being tied to troubled financial markets, had influenced his decision.

Senator Fielding said he still had concerns that the alcopops tax increase would not tackle binge drinking, but would support the measure because it would create more revenue to the government.

But he still has concerns that lifting the income thresholds on Medicare levy surcharge would leave lower-income people worse off.

However, he said he would vote for both measures because it was in the national interest.

"At the end of the day if the economy goes down the gurgler, then families are going to be severely worse off," Senator Fielding said.

Senator Fielding's support for government bills does not extend to Fuel Watch, which is not a budget bill.

The scheme was "dubious" and Family First would only vote for it on the condition that it was introduced in states where the premier and peak motoring body gave their permission.

In response to the world financial crisis, Senator Fielding will introduce legislation restricting the "golden parachutes" paid to executives from failed financial institutions.